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While designing a hypothesis test for population proportion, the cost of a type I error is found to be substantially greater than originally thought.
It is possible, as a response, to change the sample size and/or α.
Should they be increased or decreased? Explain.
What is the probability that their total annual costs for tutition, books and fees exceed $550,000?
the table summarizes results from 978 pedestrian deaths that were caused by automobile
You just finished getting your data, made sure there were no fliers and the data was correct You created a mean and standard deviation and ran your Z test at the 0.05 alpha Your decision rule is 1.645 and your Z test statistic ( step 3 ) is 1.647
Since Variable 15 was determined to be categoric, regression was not appropriate to use; so I used Analysis of Variance (ANOVA) to examine if there was a significant relationship between Variable 8 and 15. The results (using Systat 13.0) are print..
1. Find the probability mass function (pmf) for a random variable with the following moment generating function (mgf),
The problem related to Basic Statistics and it discuss about giving an example on one of the application of sampling methods and how the sample is statistically important in allowing in taking decisions on the entire population
what are the z scores above and below the mean that contain the middle 90 of a normal
Males had a mean cholesterol level of 195 and a standard deviation of 10. If the campus was equally divided between males and females, how many males on this campus would be at increased risk?
You toss two dice and compute the "difference," which you will define to be the larger top number minus the smaller top number if the numbers are different, and 0 if the numbers are the same.
Calculate the t test statistic. Can you reject ρ = 0? (e) Use Excel's function =TDIST(t,deg_freedom,tails) to calculate the two-tail p-value.
The population standard deviation can be assumed known as .24. What is the 95% confidence interval estimate of the mean undergraduate GPA for students admitted to the top graduate business schools.
what is the importance of statistics in business decision making? describe a business situation where statistics was
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